Pyrogallic acid

[c6h6o3]

Mixed up a fresh batch of pyro stock solutions last night. This time, though, I only made A and C solutions. Then I mixed the sulfite and developed some negatives. Perfect. Beautiful image stain and virtually no general stain. Thanks again. I will do it this way from now on.

 

[Jorge]

Another advantage of doing it this way is that you have better control of the staining properties. You want less stain, use 12% solution, you want more stain use 8% solution. I had to change my concentration when I moved to Mexico as the water here is very hard and was getting way more stain than I needed......